| Timken 1111 |
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Timken 1111 as built |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-4 |
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| • UIC | 2′D2′ h2 |
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| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
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| Driver dia. | 73 in (1,854 mm) |
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| Loco weight | Working: 417,500 lb (208.8 ST; 186.4 LT; 189.4 t)
Empty: 371,100 lb (185.6 ST; 165.7 LT; 168.3 t) |
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| Tender weight | Working: 301,000 lb (151 ST; 134 LT; 137 t)
Empty: 140,700 lb (70.4 ST; 62.8 LT; 63.8 t) |
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| Tender type | Class 55E |
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| Fuel type | Coal |
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| Fuel capacity | 21 short tons (18.8 long tons; 19.1 t) |
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| Water cap. | 14,550 US gal (55,100 L; 12,120 imp gal) |
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| Firebox: | |
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| • Grate area | 88.3 sq ft (8.20 m2) |
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| Boiler pressure | 250 lbf/in2 (1.72 MPa) |
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| Superheater | Type E |
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| Cylinders | Two, outside |
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| Cylinder size | 27 in × 30 in (686 mm × 762 mm) |
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Timken 1111, also named the Timken Four Aces, was a 4-8-4 steam locomotive built in 1930 by American Locomotive Company (ALCO) as a demonstration unit for new roller bearings produced by the Timken Roller Bearing Company. It was the first locomotive built with all sealed roller bearings rather than plain bearings or a combination of the two. It was later operated by the Northern Pacific Railroad (NP) as their No. 2626.
Timken attempted to cooperate with NP at the end of the engine's career to preserve it and while the Northern Pacific was willing to cooperate in preserving the engine, the attempt ultimately failed, and the locomotive was scrapped in 1958.
